[1]
Wischers, G. 1972. Standardization of cement. Notes and explanations about the reelaboration of the German Cement Standards DIN 1164; June 1970 edition. Materiales de Construcción. 22, 145 (Mar. 1972), 43–56. DOI:https://doi.org/10.3989/mc.1972.v22.i145.1438.